Timeouts in C#

A deadline the callback cannot talk its way out of.

using Polly;
using Polly.Timeout;

var pipeline = new ResiliencePipelineBuilder()
    .AddTimeout(TimeSpan.FromMilliseconds(50))
    .Build();

try
{
    // a well-behaved callback watches its token; this one never finishes
    pipeline.Execute(token =>
    {
        while (!token.IsCancellationRequested) { }
        token.ThrowIfCancellationRequested();
    });
}
catch (TimeoutRejectedException)
{
    Console.WriteLine("gave up at 50ms, as configured");
}

How it works

1. AddTimeout takes the budget directly; the pipeline enforces it.
2. Cooperative cancellation flows through the token argument.
3. TimeoutRejectedException is the signal the deadline fired.

Keywords and builtins used here

• catch
• new
• try
• using
• var
• while

The run, in numbers

Lines

20

Characters to type

416

Tokens

70

Three-star pace

85 tpm

At the three-star pace of 85 tokens a minute, this run takes about 49 seconds.

Type this snippet

Step 2 of 2 in Resilience with Polly, step 9 of 16 in The open ecosystem.

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Timeouts in other languages

• Go